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| SR44 | MR42 | |
|---|---|---|
| Size | About as wide as a shirt button | About as wide as a shirt button Same |
| Thickness | As thick as 7 credit cards stacked | As thick as 5 credit cards stacked |
| Power | 1.55 volts | 1.4 volts |
| Kind | Watch battery | Button battery |
Lasts longer: SR44 (about 100% longer)
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No. They give different amounts of power (1.55 volts vs 1.4 volts). The wrong one can damage your device or simply won’t work.
No. They give different amounts of power (1.55 volts vs 1.4 volts). The wrong one can damage your device or simply won’t work.
SR44 (about 100% longer).
| SR44 | MR42 | |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Height | 5.4 mm | 3.6 mm |
| Nominal voltage | 1.55V | 1.4V |
| Typical capacity | 160 mAh | 80 mAh |
| Chemistry | Silver oxide | Mercury oxide |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |